Tutorials & Guides

The classic first Arduino project — blink an LED on and off.

What an Arduino actually is, which board to buy first, the handful of parts worth owning from day one, and the projects to build in your first month.

The HC-SR04 is one of the most commonly used ultrasonic sensors with Arduino. It is designed for non-contact distance measurement and is frequently used in robotics, automation, and other electronics projects. This guide explains how to connect the HC-SR04 to an Arduino and create a simple program for measuring distance. Requirements Arduino Uno or a compatible Arduino board HC-SR04 ultrasonic distance sensor

Wire either sensor, choose between them honestly, and handle the failed readings that every DHT sensor produces.

Move a servo to an exact angle, and understand why powering it from the Arduino is the mistake that breaks most first attempts.

An honest comparison of the two most common boards, and a clear rule for choosing between them.

Project ideas grouped by difficulty, with the parts each one needs and an honest note on where students usually get stuck.